Bandwidth - Measure of the maximum amount of data that can be transferred over a connection at any one time.

Bluetooth - Technology that allows devices to communicate wirelessly.

Cache - A store for frequently used data or files. Data can be accessed from a cache more quickly than from its original source. Internet Explorer uses a hard disk cache for web pages, while computer processors often have small amounts of very speedy memory as a cache.

Cookie - Text files generated by websites you visit and stored on your computer's hard disk. Cookies contain preferences and other information about your use of the sites, and are not harmful.

Domain name - the name used to identify a site on the Internet, the web address i.e. opticalparadox.co.uk